
/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "SampleCode.h"
#include "SkView.h"
#include "SkCanvas.h"
#include "SkAAClip.h"

static void testop(const SkIRect& r0, const SkIRect& r1, SkRegion::Op op,
                   const SkIRect& expectedR)
    {
    SkAAClip c0, c1, c2;
    c0.setRect(r0);
    c1.setRect(r1);
    c2.op(c0, c1, op);

    SkIRect r2 = c2.getBounds();
    SkASSERT(r2 == expectedR);
    }

static const struct
    {
    SkIRect r0;
    SkIRect r1;
    SkRegion::Op op;
    SkIRect expectedR;
    } gRec[] =
    {
        {{ 1, 2, 9, 3 }, { -3, 2, 5, 11 }, SkRegion::kDifference_Op, { 5, 2, 9, 3 }},
        {{ 1, 10, 5, 13 }, { 1, 2, 5, 11 }, SkRegion::kDifference_Op, { 1, 11, 5, 13 }},
        {{ 1, 10, 5, 13 }, { 1, 2, 5, 11 }, SkRegion::kReverseDifference_Op, { 1, 2, 5, 10 }},
    };

static void testop()
    {
    for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); ++i)
        {
        testop(gRec[i].r0, gRec[i].r1, gRec[i].op, gRec[i].expectedR);
        }
    }

static void drawClip(SkCanvas* canvas, const SkAAClip& clip)
    {
    SkMask mask;
    SkBitmap bm;

    clip.copyToMask(&mask);
    SkAutoMaskFreeImage amfi(mask.fImage);

    bm.setConfig(SkBitmap::kA8_Config, mask.fBounds.width(),
                 mask.fBounds.height(), mask.fRowBytes);
    bm.setPixels(mask.fImage);

    SkPaint paint;
    canvas->drawBitmap(bm,
                       SK_Scalar1 * mask.fBounds.fLeft,
                       SK_Scalar1 * mask.fBounds.fTop,
                       &paint);
    }

class AAClipView : public SampleView
    {
    public:
        AAClipView()
            {
            testop();
            }

    protected:
        // overrides from SkEventSink
        virtual bool onQuery(SkEvent* evt)
            {
            if (SampleCode::TitleQ(*evt))
                {
                SampleCode::TitleR(evt, "AAClip");
                return true;
                }
            return this->INHERITED::onQuery(evt);
            }

        virtual void onDrawContent(SkCanvas* canvas)
            {
#if 1
            SkAAClip aaclip;
            SkPath path;
            SkRect bounds;

            bounds.set(0, 0, 20, 20);
            bounds.inset(SK_ScalarHalf, SK_ScalarHalf);

//        path.addRect(bounds);
//        path.addOval(bounds);
            path.addRoundRect(bounds, 4, 4);
            aaclip.setPath(path);
            canvas->translate(30, 30);
            drawClip(canvas, aaclip);

            SkAAClip aaclip2;
            path.offset(10, 10);
            aaclip2.setPath(path);
            canvas->translate(30, 0);
            drawClip(canvas, aaclip2);

            SkAAClip aaclip3;
            aaclip3.op(aaclip, aaclip2, SkRegion::kIntersect_Op);
            canvas->translate(30, 0);
            drawClip(canvas, aaclip3);

#endif

#if 0
            SkRect r;
            r.set(0, 0, this->width(), this->height());
            r.inset(20, 20);
            canvas->clipRect(r);

            SkPath path;
            path.addRect(r);
            SkPaint paint;
            paint.setAntiAlias(true);
            paint.setColor(SK_ColorRED);
            canvas->drawPath(path, paint);
#endif
            }

    private:
        typedef SkView INHERITED;
    };

//////////////////////////////////////////////////////////////////////////////

static SkView* MyFactory()
    {
    return new AAClipView;
    }
static SkViewRegister reg(MyFactory);

